IS_DUP
ifp->int_state |= IS_DUP;
&& (!(ifp->int_state & IS_DUP)
ifp->int_state &= ~(IS_CHECKED | IS_DUP);
} else if (ifp->int_state & IS_DUP) {
if (ifp->int_state & IS_DUP) {
{ IS_DUP, 0, "DUPLICATE" },